US Robotics USR9108
With more LAN ports you are able to connect more computers to the network directly using LAN cables.
Asus GX1008B V4
A WAN (Wider Area Network) port is most commonly used to connect the router to the Internet. It can also be used to connect to an external private network.
With more USB ports, you are able to connect more devices.
A higher maximum Wi-Fi speed results in better performance. This is measured in megabytes per second.
Asus GX1008B V5
With DNS relay or DNS caching, the router stores the response to queries for a short time. This means that the same query will return a quicker response if repeated from another computer in the same network.
Apple Airport Time Capsule
More antennas result in increased signal strength. External antennas can be repositioned in order to improve the signal, and replaced with a longer antenna if needed.
A network firewall protects a computer network from unauthorized access.
URL filters are particularly useful if you want to allow different web access depending on the time of day, for instance allowing employees to use personal email outside of working hours.
You can enable IPsec Passthrough, to allow IPsec (IP Security Protocol) encrypted/authenticated data to pass through your router, enabling increased security.
You can enable L2TP Passthrough. L2TP (Layer 2 Tunneling Protocol) is a VPN (Virtual Private Network) protocol for carrying data from one device to another securely over the Internet.
This is a security feature in which network access is granted to devices based on their unique MAC address. It can provide increased security, but it can be a risk if the user loses the device.
You can enable PPTP (Point-to-point tunneling protocol) Passthrough. This allows VPN connections using PPTP to pass through the router with ease. This method is less secure than L2TP passthrough.
With (QoS) Quality of Service, you can optimise performance by deciding which traffic to prioritise when a bottleneck occurs. You can decide which traffic is important based on things like IP address and type of Internet service.
Dynamic routing is useful if you need to configure several routers, as they can automatically find network destinations and best routes, as well as sharing information between routers. They can reroute automatically if there is a fault somewhere.